Improvement in flour-dressing machines



UNITEID STATES PATENT ori-rca MORITZ MARTIN, lOF BITTERFELD, PRUSSIA.

IMPROVEMENT IVN `lf'LOUR--DRESSING MACHINES.

Specification forming part of Letters Patent No. 159,694, datedFebruary 9, 1875 application led December 16, 1874.

To all whom it may concern:

Be it known that I, MORITZ MARTIN, of Bitterfeld, Kingdom of Prussia, have invented certain Improvements in Flour-Dressing Machines, of which the following is a speciica tion:

This invention is intended to increase the efficiency of the dressing-cylinder, and consequently to reduce the space hitherto occupied in mills by flour-dressing machines.

The machine is illustrated in the accompanying drawing, in which Figures l and 2 are vertical sections at right angles' to each other.

The machine consists of a dressing-cylinder, K, comparatively short, but large in diameter, into which certain quantities of greats are fed intermittently. After the flour has been sifted olf, the bran is removed from the cylinder automatically, and a new portion of groats admitted. l

a is a hopper, in which a small shaft, f, furnished with pins, stirs up the groats, so as to facilitate their passage into the opening c of the slowly-revolving cast-iron tube b. In the drawing this opening is shown in its lowest position, so that at the time no groats can enter the tube; but supposing the same to be in communication with the hopper, a second opening, d, will be at the bottom, and considering that the worm on the shaft w revolves much faster than the tube b, the groats will speedily be delivered into the dressing-cylinder k. At one end the tube b turns in a wooden bearing, and at the other on a shaft, w, as will readily be seen from the drawing. g is the spur-wheel, by means of which the tube is put in motion. The dressing-cylinder consists of the two disks o and l, by preference made of wood, and connected to each other by the adjustable stays 1 r, each having a right-hand thread at one end, and a left-hand thread at the other, and turning in projecting ears on the disks. On the periphery of these disks is fastened the silk gauze, or other dressing or bolting cloth,y

the' cylinder 7c, the shaft w, and the worm on the same rotate together, being driven from the pulley u.

The gearing for the transmission of motion to the tube b, and also to the small shal'tf, will readily be understood by reference to the drawing, and it will be observed that the tube b aslowly revolves in a direction contrary to the dressing-cylinder.

To the tube b are xed a number of arms, s, which bear on their ends the perforated rakes or stirrers t, which are not placed square to their line of motion, but somewhat inclined alternately right and left, as shown in dotted lines, Fig. 2, so as to rake the groats from one side to the other, and to stir them up. By this means .the bolting process is materially accelerated.

The perforations serve to lessen the resistance of the greats against the rakes or stirrers. The flour sifted through the guaze falls into a funnel-shaped bottom, a, of -the box m, and thence into a bag or other receptacle, as usual.

The bran is removed by a scoop or shovel, c, also lixed to the tube b, and revolving with the same, the scoop at every turnA taking up and raising the bran, and then letting it slide through the opening h into the tube b, whereupon it is carried by the worm to the opening g. The collar p being also provided.

with one or more openings, the bran will fall through the channel x into a proper receptacle.

It will be seen that all the moving parts are placed in proper bearings fixed to a suitable frame, and that they are so arranged with respect to each other and the fixed parts that no waste of flour can take place.

I do not claim, broadly, a flour-dressing cylinder in which the sides may be adjusted on the shaft to stretch the cloth; but

I claimc 1. The combination of the disks o l, carrying the dressing-cloth and adjusting-stays r r, each having a right-hand thread on one end, and a left-hand thread on the other, all as set forth.

2. The rakes or stirrers t, inclined alternately right and left, and revolving within, and in close proximity to, the cylindrical dressingcylinder, as and for the purpose set forth.

3. The combination of the hollow perforated tube b and the scoop or shovel e, extending radially from the shaft, as and for the purpose set forth.

4. The combination of the revolving tube b, and the Worm on the shaft w, with the dressing-cylinder, as and for the purpose described.

In testimony whereof I have signed my name to this specoation in the presence of two subscribing witnesses.

M. MARTIN.

Witnesses :v

T. AUPREs, J ULIUs EDMUND TRALL. 

